Hawkynt

MISTY1

Japanese block cipher by Mitsuru Matsui designed for provable security. Uses 64-bit blocks and 128-bit keys with 8-round FL/FO structure. First practical cipher with decorrelation theory proof.

Properties

Property Value
Category Block Ciphers
Sub-category Block Cipher
Security status Not classified
Complexity Intermediate
Inventor Mitsuru Matsui
Year 1996
Origin 🇯🇵 Japan
Source algorithms/block/misty.js

Parameters

Parameter Supported values
Key sizes 16 bytes (128 bits)
Block sizes 8 bytes (64 bits)

Security

Status: not classified — treat as unverified.

No vulnerabilities are recorded for this implementation.

Documentation

References

Test vectors

7 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — RFC 2994 Appendix A - first 64-bit block

Field Value
key 00112233445566778899aabbccddeeff
input 0123456789abcdef
expected 8b1da5f56ab3d07c

Vector 2 — RFC 2994 Appendix A - second 64-bit block

Field Value
key 00112233445566778899aabbccddeeff
input fedcba9876543210
expected 04b68240b13be95d

Vector 3 — RFC 2994 Appendix A - 128-bit plaintext in ECB mode

Field Value
key 00112233445566778899aabbccddeeff
input 0123456789abcdeffedcba9876543210
expected 8b1da5f56ab3d07c04b68240b13be95d

Vector 4 — NESSIE submission testvectors.txt - set 1, vector 0

Field Value
key 80000000000000000000000000000000
input 0000000000000000
expected b5eda7d64fcd2a02

Vector 5 — NESSIE submission testvectors.txt - single low key bit

Field Value
key 00000000000000000000000000000001
input 0000000000000000
expected 2049aa1be3546aed

Vector 6 — NESSIE submission testvectors.txt - repeating 0x6c

Field Value
key 6c6c6c6c6c6c6c6c6c6c6c6c6c6c6c6c
input 6c6c6c6c6c6c6c6c
expected a0cc24a85b11e9cd

Vector 7 — NESSIE submission testvectors.txt - all ones

Field Value
key ffffffffffffffffffffffffffffffff
input ffffffffffffffff
expected 651f3092afa551d0

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